Pairing Helm of the Host along with Combat Celebrant gives you access to infinite combat phases
Blue/black has probably the best set of incidental incubate effects in Merciless Repurposing, Traumatic Revelation, Eyes of Gitaxias and Assimilate Essence, so you can get a lot of easy transform triggers without taking away from the main plan
The main design on this will be familiar, but this time the background of the card itself, and the edging, is dark, giving the whole card a darker and more mysterious feel
In that case, it would be a shock to everyone at the table and not something predictable that is ticking up for multiple turns
Discard effects are essential to the balance of competitive Magic , and to the color identity of black as a whole